27 weeks - sex has become awkward lol

My husband works a demanding and tiring schedule so sex is pretty much limited to weekends. Well today we had an opportunity to do it and I couldn't really get comfortable. We started off with doggy but I felt like I was stretching my back too much. So I flipped over and tried to be sexy by putting my legs up on his shoulders and then I couldn't breathe!!! 😂 hubby was a good sport and we both had a good laugh but I have 3 more months and I would still like to have good sex and satisfy my husband. Any tips for comfortable sex when your belly gets in the way?